IN100-Q1-R-RC1F datasheet(23/49 Pages) ETC

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N1EDOC-DS-IN100-EN-V1.3

4.2. I2C

To communicate with sensors that do not support UART, an I2C master is provided. The I2C

master can communicate with multiple external I2C slave sensors/devices with different slave

addresses in sequence. The I2C commands are stored in the region 4 of the eFuse memory. For

each I2C slave, the I2C master (based on the preset values in the eFuse memory) can program

registers or read back values. The I2C master can also insert delays between two I2C commands

to give the I2C slave time to respond to the previous command. The read-back value will be stored

in memory and can be broadcast through as part of packet payload. The operations of the I2C

master can be defined through the NanoBeacon Config PC GUI. The I2C interface SCL and SDA

pins can refer to Table 1.

4.3. Pulse train counting and pulse width detection

To interface with some external digital-interface sensors, the device can count the number of

pulses in a pulse sequence (Figure 7). the device can also detect the high/low width ratio of the

sequence of pulses (pulse-width modulation, Figure 8). The ratio between the time high and time

low of a pulse can be encoded as a digital 0 or 1. The sequence can be applied to any of the available

pins defined in Table 1 above.

Figure 7 : Pulse counting

Figure 8 : PWM sequence

4.4. Sensor ADC

The Sensor ADC has 11 physical bits and can convert at a maximum of 64KSPS. The input to the

ADC is preceded by a multiplexer which enables the user to sample up to 4 different channels, as

shown in Figure 9. The package options and the pin assignments are shown in

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